What is another function of the insulating liquid apart from providing electrical insulation?

The insulating liquid in electrical equipment, such as transformers and circuit breakers, serves several key functions in addition to providing electrical insulation. One crucial function is its ability to assist in arc-quenching. When there is an electrical fault or interruption in the circuit, an arc can form, which is a discharge of electricity through the air. The presence of insulating liquid aids in extinguishing this arc by quickly cooling down the area and reducing the ionization of the medium around the arc, thereby helping to prevent damage to equipment and ensuring a safe operation.

Arc-quenching is particularly significant in devices like oil circuit breakers, where the insulating liquid is specifically designed to cool the arc and interrupt the flow of current effectively. This property of the insulating liquid is vital for maintaining the integrity of the electrical system and ensuring operational safety during fault conditions.

While enhancing heat conductivity and lubricating moving parts may be important in certain mechanical applications, these functions are not the primary roles of insulating liquids in electrical equipment. Additionally, while reducing environmental impact is an important consideration in modern electrical systems, it does not directly relate to the operational purpose of the insulating liquid in arc-quenching.